Chris@16: // ----------------------------------------------------------------------------
Chris@16: // Copyright (C) 2002-2006 Marcin Kalicinski
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // For more information, see www.boost.org
Chris@16: // ----------------------------------------------------------------------------
Chris@16: #ifndef BOOST_PROPERTY_TREE_DETAIL_PTREE_UTILS_HPP_INCLUDED
Chris@16: #define BOOST_PROPERTY_TREE_DETAIL_PTREE_UTILS_HPP_INCLUDED
Chris@16: 
Chris@16: #include <boost/limits.hpp>
Chris@16: #include <boost/type_traits/integral_constant.hpp>
Chris@16: #include <boost/mpl/has_xxx.hpp>
Chris@16: #include <boost/mpl/and.hpp>
Chris@16: #include <string>
Chris@16: #include <algorithm>
Chris@16: #include <locale>
Chris@16: 
Chris@16: namespace boost { namespace property_tree { namespace detail
Chris@16: {
Chris@16: 
Chris@16:     template<class T>
Chris@16:     struct less_nocase
Chris@16:     {
Chris@16:         typedef typename T::value_type Ch;
Chris@16:         std::locale m_locale;
Chris@16:         inline bool operator()(Ch c1, Ch c2) const
Chris@16:         {
Chris@16:             return std::toupper(c1, m_locale) < std::toupper(c2, m_locale);
Chris@16:         }
Chris@16:         inline bool operator()(const T &t1, const T &t2) const
Chris@16:         {
Chris@16:             return std::lexicographical_compare(t1.begin(), t1.end(),
Chris@16:                                                 t2.begin(), t2.end(), *this);
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16:     template <typename Ch>
Chris@16:     struct is_character : public boost::false_type {};
Chris@16:     template <>
Chris@16:     struct is_character<char> : public boost::true_type {};
Chris@16:     template <>
Chris@16:     struct is_character<wchar_t> : public boost::true_type {};
Chris@16: 
Chris@16: 
Chris@16:     BOOST_MPL_HAS_XXX_TRAIT_DEF(internal_type)
Chris@16:     BOOST_MPL_HAS_XXX_TRAIT_DEF(external_type)
Chris@16:     template <typename T>
Chris@16:     struct is_translator : public boost::mpl::and_<
Chris@16:         has_internal_type<T>, has_external_type<T> > {};
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16:     // Naively convert narrow string to another character type
Chris@101:     template<typename Str>
Chris@101:     Str widen(const char *text)
Chris@16:     {
Chris@101: 	Str result;
Chris@16:         while (*text)
Chris@16:         {
Chris@101:             result += typename Str::value_type(*text);
Chris@16:             ++text;
Chris@16:         }
Chris@16:         return result;
Chris@16:     }
Chris@16: 
Chris@16:     // Naively convert string to narrow character type
Chris@101:     template<typename Str, typename char_type>
Chris@101:     Str narrow(const char_type *text)
Chris@16:     {
Chris@101: 	Str result;
Chris@16:         while (*text)
Chris@16:         {
Chris@16:             if (*text < 0 || *text > (std::numeric_limits<char>::max)())
Chris@16:                 result += '*';
Chris@16:             else
Chris@101:                 result += typename Str::value_type(*text);
Chris@16:             ++text;
Chris@16:         }
Chris@16:         return result;
Chris@16:     }
Chris@16: 
Chris@16:     // Remove trailing and leading spaces
Chris@101:     template<class Str>
Chris@101:     Str trim(const Str &s, const std::locale &loc = std::locale())
Chris@16:     {
Chris@101:         typename Str::const_iterator first = s.begin();
Chris@101:         typename Str::const_iterator end = s.end();
Chris@16:         while (first != end && std::isspace(*first, loc))
Chris@16:             ++first;
Chris@16:         if (first == end)
Chris@101:             return Str();
Chris@101:         typename Str::const_iterator last = end;
Chris@16:         do --last; while (std::isspace(*last, loc));
Chris@16:         if (first != s.begin() || last + 1 != end)
Chris@101:             return Str(first, last + 1);
Chris@16:         else
Chris@16:             return s;
Chris@16:     }
Chris@16: 
Chris@16: } } }
Chris@16: 
Chris@16: #endif